Impeller spacer and bushing



Oct. 2o, *1.925.

c. F. ziMANsKY IMPELLER SPACER AND BUSHING Filed Feb. 11, 1924 Patented Oct. 20, 1925.

UNITED STATES 1,557,918 .PATENT- OFFICE.

CURT F. ZIMANSKY, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOE TO G. W. IPR-ICE PUMP AND ENGINE COMPANY, OF SAN FRANCISCO, CALIFORNIA.

IMPELLER SPACER AND RUSHING.

Application led February 11, 1324. Serial No. 692,027.

To all 'whom' z' may concern.' v

Be it known that I, CURT F. ZIMANSKY, a citizen of the United States, residing in the city and county of San Francisco and State of California, have invented a new and useful Improvement in an Impeller Spacer and Bushing, of which the following is a specification.

My invention relates to improvements in rotary well pumps and 'particularly to the mounting of the runners thereof upon the shaft of the pump.

The primary object of my invention is to provide an improved construction in well pumps.

Another object is to provide an improved means for rigidly securing the runners of awell pump against longitudinal movementrelative to the drive shaft.

A further object is to provide an improved construction designed to prevent wear upon the shaft within the bearings of the pump bowls.

A still further object is to provide an improved construction adapted to facilitate the construction and assembly of the pump and to insure the accurate positioning of `the parts.

I accomplish these and other objects by means of the device disclosed in the drawings forming a part of the present speciiication wherein like characters of reference are used to designate similar parts through said specification and drawings and in which,

The figure is a vertical section of a rotary pump showing my improved construction.

Referring to the drawing the numeral 1 is used to designate in general a pump mounted upon a discharge casing 2 within a well casing 3. The pump consists of a plurality of bowls 4 each of which includes a bearing portion 6 within which is mounted a drive shaft? which extends upwardly to the top of the well through a suitable shaft casing 8 centrally disposed within the discharge casing 2. Runners or impellers 9 are secured upon the shaft 7 within the bowls 4 for forcing water upwardly through the discharge casing 2 in the well known manner.

One of the chief diiiiculties encountered in assembling a pump of the type described is to rigidly secure the runners upon the shaft in correct relation to their respective bowls and to prevent longitudinal movement along the shaft when under heavy load. My

present invention is therefore directed to an improved construction adapted to faci-litate the assembly ofthe parts and to rigidly secure the runners against longitudinal movement. I accomplish this in the following manner. 1

The bearing portions 6 are made of a diameter considerably greater than the diameter of the shaft 7 to receive sleeves 11 mounted upon the shaft. The runners 9 are feathered upon the shaft 7 by means ofsuitable keys engaging keyways 12 formed upon the shaft at appropriate points so as to normally permit a slight longitudinal movement of the ruimer. In assembling the pump the runners are compressed against Vthe adjacent sleeves 11 which are made of a length adapted to obtain a correct spacing of the runners. This is accomplished inthe following manner. The bowlsrll, runners 9, and sleeves 11 are placed upon the sha ft in their correct relation and collars 13 and 14 permanently secured upon the shaft above the bearing portion within the uppermost bowl, and below the lowermost runner respectively. The up permost sleeve 11Y abuts against the collar 13 and the uppermost runner in turn abuts against the lower end of said sleeve.` The succeeding` sleeves 11 are engaged between succeeding runners as shown in the drawing. The collar 14, secured below the lowermost' runner is provided with an extension 16 axially recessed and internally threaded to receive a threaded portion 17 of a bushing 18 mounted upon the shaft between the collar 14 and the runner. The bushing 18 is initially receded to its eXtreme position within the threaded recess of the collar 14. When the several parts are assembled as above described, the bushing 18 is advanced from the collar to firmly compose the runners and sleeves against the collar 13, and the bushing thereafter secured against further rotation by means of a set screw 19 or other suitable securing means, in this manner rigidly securing the runners against longitudinal movement upon the shaft and holding said runners in accurately spaced relation.

In addition to holding the runners in rig- Y id spaced relation, the sleeves perform the further function of preventing wear upon vided with a bushing 2l secured therein, said bushings being machined to form a running` fit with the sleeves l1 extending therethrough. The pressure applied upon the runners and the sleeves by means of the threaded bushing' 18 is sufficient to cause the sleeves to rotate with the shaft and runners and to prevent the entrance of Water between the sleeves and the runners and thus between the sleeve and the shafts.

This feature of my invention is of importance for the reason that one of the most frequent causes of trouble with pumps of the type described is the wearing of the bearings within the bowls of the pump. The sand and grit frequently carried by the water as pumped from the well'worlrs into the bearing with the'result that both the shaft and the bearing portion of the bowl is rapidly eut out. rIhis wear of the bearing increases the natural tendency of the shaft to whip within its casing and as a result the pump has to be withdrawn from the well and eX- pensive replacements often have to be made.

By my improved construction the wear which would normally occur upon the shaft willk be taken up by the sleeves 11 and, in case the wear becomes excessive, only the sleeve will have tovbe replaced. In a sim-ilar way, the bushing 21 within the bearing portion of the bowl takes up wear which would otherwise damage the bowl itself and this member may be readily replaced, but as the use of bushings in bearings of all kinds are well known no vclaim is made to this spevcific element of the construction I have dis-l closed. y

From the above description it will be readily seen that I have provided an improved construction which materially facilitates the Vassembly of the pump and which results in a rigid and accurate securing of the runners upon the shaft in such manner as to prevent wear upon the shaft during operation.

i Having thus described my invention what I claim as new and desire to secure by Iletters Patent is, y

l. The combination with the bowls and shaft of a rotary well pump of a runner Vfeathered upon the shaft within each bowl; a retaining Y collar secured uponthe shaft; spacing members mounted upon the shaft for positioning the runners with respect to the collar; a member secured upon the shaft adjacent the runner remote from the' collar; and a bushing screw threaded onto said member, said bushing being movable upon said threads to engage and compress the runners and vspacing members aga-inst the retaining collar for rigidly securing said runners against longie tudinal movement upon the shaft.

2. The combination with the drive shaft of a well pump ofa plurality of runners feathered upon the shaft; a retaining collar secured upon the shaft abovel the runners; spacing members mounted upon the shaft adjacent each runner; and securing means for rigidly securing the runners and'spacing members against longitudinal movement along` the shaft, said means comprising a collar secured upon the shaft below the runners, and a bushing threaded upon lthe collar and movable relative thereto to Y compress the runners and spacing members against the retaining collar.A

3. In a device of the character described, a securing member comprising a collar secured to a pump shaft provided with pump runners; a threaded extension formed upon the collar; and a bushing movably mounted upon the shaft and arranged to engage the threads of the extension whereby said bushing may be advanced to rigidly secure the pump runners against longitudinal movement upon the shaft.` f

4. In a device of the character described, a securing, member mounted upon a pump shaft provided with pump runners, said securing member comprising a collar securedV upon the shaft and having.v an internally threaded recess axially disposedv in one lend thereof; and a bushing disposed in one end thereof; and a bushing mounted upon the shaft and provided with external threads arranged toengage the threads of thecollar whereby said bushing may be. advanced along the shaft relative` tov the collar for se.- curing the runners against longitudinal movement along; the shaft. y

In witness whereofIhereunto set my signature. c l

GURT F. ZIMANSKY. 

